Method for bleaching and dyeing spooled threads

Abstract

The method comprises the steps of impregnating spooled threads with a cold treatment liquid inside a kier, leaving an air cushion above the liquid inside the kier, discharging the liquid from the kier through a liquid discharge outlet by feeding steam above the air cushion, stopping the discharge when the steam reaches the liquid discharge outlet, and treating the spooled threads with steam inside the kier.

We claim: 
     
       1. A method for treating spooled threads comprising the steps of impregnating the spooled threads with a cold treatment liquid inside a kier, leaving an air cushion above the liquid inside said kier,   discharging the liquid from the kier through a liquid discharge outlet by feeding steam above the air cushion,   stopping the discharge when the steam reaches the liquid discharge outlet, and     treating the spooled threads with steam inside the kier.   
     
     
       2. The method for treating spooled threads of claim 1, in which the steam treatment is regulated for a pre-determined duration from the moment where a determined temperature is reached inside a spooled thread.